(Courtesy photo/Lori Spelde) Members of the Spring Lake/Ferrysburg Police Department lower the American flag half staff during a memorial ceremony this morning outside the police department. The ceremony memorialized police officers who died in the line of duty. May 15 has been National Peace Officers Memorial Day, and the week containing May 15 has been National Police Week since President John F. Kennedy signed Public Law 87-726 on Oct. 1, 1962. Ferrysburg and Spring Lake officials also participated in the ceremony.